Paul Meier, Tireless Laborer

Ward {2}
Whenever you sacrifice a Boar, Bird, Ox, Goat, Sheep, Elk, or Caribou, create a Food token.
{t} Sacrifice three Food tokens: create a green aura enchantment token named Fertile Land attached to target land. The token has enchant land and "enchanted land has "{t}: Add one mana of any color to your mana pool" and if enchanted land is controlled by an opponent whenever enchanted land becomes tapped create a 0/1 white Goat creature token."